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It’s quick and easy. Just click here.

After signing up, log in to Function to easily schedule your lab visit at one of over 2,000 Quest Diagnostics locations nationwide at the time that works for you.

In your dashboard, select the arrow next to the upcoming visit you'd like to reschedule and choose the "Reschedule" option.

Membership includes 100+ lab tests across every major organ system—selected by the world’s top doctors to monitor for thousands of diseases. And 60+ tests halfway through the year to see what’s changed. Hormones, heart, thyroid, nutrients, metals, metabolism, autoimmunity, liver, and inflammation—what others skip, we don’t. If it impacts your future, we test it.

Advanced Add-Ons like Galleri and MRI and CT scans are available for an additional cost. See the full list of tests.

Function is a built to be a lifelong partner for your health. While we don't allow pauses at this time, you can cancel and rejoin at any time.